User guide

8 Maintenance and fault rectification
8.1 Maintenance, cleaning
When used in the correct way, no special maintenance is required in
normal operation.
In some applications, product buildup on the sensor diaphragm can
influence the measuring result. Depending on the sensor and
application, take precautions to ensure that heavy buildup, and
especially a hardening thereof, is avoided.
If necessary, the transmitter has to be cleaned. In this case, make sure
that the materials are resistant against the cleaning detergents.
8.2 Remove interferences
The operator of the system is responsible for taken suitable measures
to remove interferences.
A maximum of reliability is ensured. Nevertheless, faults can occur
during operation. These may be caused by the following, e.g.:
l Sensor
l Process
l Power supply
l Signal processing
The first measures to be taken are to check the output signals as well
as to evaluate the error messages via the indicating and adjustment
module. The procedure is described below. Further comprehensive
diagnostics can be carried out on a PC with the software PACTware
and the suitable DTM. In many cases, the causes can be determined
in this way and faults can be rectified.
? When an additional instrument is connected, the H1 segment fails.
l Max. supply current of the segment coupler exceeded
à Measure the current consumption, reduce size of segment
? Measured value on the indicating and adjustment module does not
correspond to the value in the PLC
l The menu item "Display - Display value" is not set to "AI-Out"
à Check values and correct, if necessary
? Instrument does not appear during connection setup
l Incorrect termination
à Check termination at the beginning and end points of the bus
and terminate, if necessary, according to the specification
l Instrument not connected to the segment
à Check and correct
Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
Checking Foundation
Fieldbus
36 Process pressure transmitter IPT-1* Vers. 3.0 - metalic sensor • Foundation Fieldbus
8 Maintenance and fault rectification
31545-EN-081211